CN219302395U

CN219302395U - Sulfur hexafluoride gas and moisture monitoring device

Info

Publication number: CN219302395U
Application number: CN202223528218.3U
Authority: CN
Inventors: 鹿波; 代敏
Original assignee: Zhuhai Jisen Electrical Appliances Co ltd
Current assignee: Zhuhai Jisen Electrical Appliances Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-07-04
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a sulfur hexafluoride gas and moisture monitoring device, which comprises: an electrical device having a working cavity filled with sulfur hexafluoride gas; the humidity detection device is communicated with the working inner cavity; the first interface of the first three-way valve is communicated with the humidity detection device; the drying device is communicated with the third interface of the first three-way valve; the second port of the second three-way valve is communicated with the second port of the first three-way valve, and the third port of the second three-way valve is communicated with the drying device; the fan assembly is communicated with the first interface of the second three-way valve and the working inner cavity; by the device, the sulfur hexafluoride gas filled in the electrical equipment can be ensured to be dried, and meanwhile, the downtime of the electrical equipment is reduced.

Description

Sulfur hexafluoride gas and moisture monitoring device

Technical Field

The utility model relates to the field of electrical equipment, in particular to a sulfur hexafluoride gas and moisture monitoring device.

Background

Sulfur hexafluoride gas has been widely used in high-voltage electrical equipment because of its excellent insulating and arc extinguishing properties. The moisture content in the sulfur hexafluoride gas is increased due to factors such as sulfur hexafluoride gas manufacturing links, electrical equipment manufacturing and installation processes, equipment leakage, adsorbents and the like, so that the probability of flashover faults on the inner surface of the insulator is increased.

The traditional electrical equipment is generally internally provided with a set of humidity monitoring system, and when the excessive humidity of sulfur hexafluoride gas in the equipment is detected, an alarm signal is sent out; at the moment, the operation of equipment is required to be stopped, and sulfur hexafluoride gas is pumped out, dried and then refilled; not only is time consuming, but also the electrical equipment must be shut down for maintenance.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the sulfur hexafluoride gas and moisture monitoring device which can reduce the downtime of the electrical equipment while guaranteeing the drying of sulfur hexafluoride gas filled in the electrical equipment.

The sulfur hexafluoride gas and moisture monitoring device of the utility model comprises: an electrical device having a working cavity filled with sulfur hexafluoride gas; the humidity detection device is communicated with the working inner cavity; the first interface of the first three-way valve is communicated with the humidity detection device; the drying device is communicated with the third interface of the first three-way valve; the second port of the second three-way valve is communicated with the second port of the first three-way valve, and the third port of the second three-way valve is communicated with the drying device; and the fan assembly is communicated with the first interface of the second three-way valve and the working inner cavity.

According to some embodiments of the utility model, a fan assembly includes; the volute is provided with an air inlet part and an air outlet part, the air inlet part is communicated with a first interface of the second three-way valve, and the air outlet part is communicated with the working inner cavity; the centrifugal fan is arranged in the volute, the air inlet side of the centrifugal fan faces the air inlet part, and the air outlet side of the centrifugal fan faces the air outlet part; the driving device is arranged on the volute and used for driving the centrifugal fan to rotate.

According to some embodiments of the utility model, the driving device comprises an outer rotor motor, a stator of the outer rotor motor is arranged outside the volute, and a rotor of the outer rotor motor is fixedly connected with the centrifugal fan coaxially.

According to some embodiments of the utility model, the outer rotor motor is a variable frequency motor.

According to some embodiments of the utility model, the stator of the external rotor motor is detachably connected to the volute.

According to some embodiments of the utility model, the drying apparatus comprises: the box body is provided with a drying inner cavity, two drying interfaces communicated with the drying inner cavity are arranged on the box body, and the two drying interfaces are respectively communicated with a third interface of the first three-way valve and a third interface of the second three-way valve; the adsorption component is arranged in the drying inner cavity and comprises a solid adsorbent, and the solid adsorbent can absorb moisture contained in sulfur hexafluoride gas.

According to some embodiments of the utility model, the drying apparatus further comprises a weight sensor disposed at a bottom wall of the drying chamber, the solid adsorbent being disposed entirely over the weight sensor.

According to some embodiments of the utility model, the box body is detachably connected with a bottom cover, the bottom cover can seal the drying cavity, and the weight sensor is arranged on the bottom cover.

According to some embodiments of the utility model, the box body is provided with a vacuumizing interface, and the vacuumizing interface is used for connecting the sulfur hexafluoride vacuumizing recovery device.

According to some embodiments of the utility model, the vacuum-pumping interface is provided with a switch valve, and the switch valve can be connected with the sulfur hexafluoride vacuum-pumping recovery device.

By the device, in the operation process of the electrical equipment, the first interface of the first three-way valve is communicated with the second interface, the first interface of the second three-way valve is communicated with the second interface, and the fan assembly can drive sulfur hexafluoride gas to flow through the humidity detection device, the first three-way valve, the second three-way valve and the fan assembly and then flow back to the electrical equipment; when the humidity detection device detects that the humidity of sulfur hexafluoride gas is too high, the first interface and the third interface of the first three-way valve can be controlled to be communicated, and the first interface and the third interface of the second three-way valve can be controlled to be communicated; the sulfur hexafluoride gas flows through the drying device and then flows back to the electrical equipment, and when the humidity of the sulfur hexafluoride gas is reduced to a specified value, the first interface and the second interface of the first three-way valve are controlled to be communicated, and the first interface and the second interface of the second three-way valve are controlled to be communicated; the whole maintenance process effectively ensures the drying of sulfur hexafluoride gas, and meanwhile, the electrical equipment is not required to be stopped in the drying process, so that the stopping time of the electrical equipment is effectively reduced.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a system diagram of a sulfur hexafluoride gas and moisture monitoring device in accordance with an embodiment of the utility model;

FIG. 2 is an isometric view of the fan assembly of FIG. 1;

FIG. 3 is a front view of the blower assembly of FIG. 2;

FIG. 4 is a cross-sectional view taken in the direction F-F of FIG. 3;

FIG. 5 is an isometric view of the drying apparatus of FIG. 1;

FIG. 6 is a front view of the drying apparatus of FIG. 5;

fig. 7 is a cross-sectional view in the direction F-F of fig. 6.

The above figures contain the following reference numerals.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a plurality means one or more, and a plurality means two or more, and it is understood that greater than, less than, exceeding, etc. does not include the present number, and it is understood that greater than, less than, within, etc. include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 7, the sulfur hexafluoride gas and moisture monitoring device of the present embodiment includes: an electrical apparatus A1 having a working chamber filled with sulfur hexafluoride gas; the humidity detection device A2 is communicated with the working inner cavity; the first interface of the first three-way valve A4 is communicated with the humidity detection device A2; the drying device A6 is communicated with a third interface of the first three-way valve A4; the second port of the second three-way valve A5 is communicated with the second port of the first three-way valve A4, and the third port of the second three-way valve A5 is communicated with the drying device A6; the fan assembly A3 is communicated with the first interface of the second three-way valve A5 and the working inner cavity.

By using the device, in the operation process of the electrical equipment A1, the first interface and the second interface of the first three-way valve A4 are communicated, the first interface and the second interface of the second three-way valve A5 are communicated, and the fan assembly A3 can drive sulfur hexafluoride gas to flow through the humidity detection device A2, the first three-way valve A4, the second three-way valve A5 and the fan assembly A3 and then flow back to the electrical equipment A1; when the humidity detection device A2 detects that the humidity of sulfur hexafluoride gas is too high, the first interface and the third interface of the first three-way valve A4 can be controlled to be communicated, and the first interface and the third interface of the second three-way valve A5 can be controlled to be communicated; after sulfur hexafluoride gas flows through the drying device A6 and then flows back to the electrical equipment A1, when the humidity of the sulfur hexafluoride gas is reduced to a specified value, the first interface and the second interface of the first three-way valve A4 are controlled to be communicated, and the first interface and the second interface of the second three-way valve A5 are controlled to be communicated; the whole maintenance process effectively ensures the drying of sulfur hexafluoride gas, meanwhile, the electrical equipment A1 is not required to be stopped in the drying process, and the stopping time of the electrical equipment A1 is effectively reduced.

Wherein, the first three-way valve A4 and the second three-way valve A5 can be commonly used three-way valves in the prior art, and the three-way valves are provided with three interfaces, and two interfaces can be selectively communicated under the control of a control system; the drying device A6 may be a drying and dehumidifying device commonly used in the prior art, such as a heat pump drying device A6 or a rotary wheel dehumidifying and drying device A6.

Specifically, as shown in fig. 2 to 4, the blower assembly A3 includes; the volute 100 is provided with an air inlet part 120 and an air outlet part 110, the air inlet part 120 is communicated with a first interface of the second three-way valve A5, and the air outlet part 110 is communicated with the working inner cavity; the centrifugal fan 130 is arranged in the volute 100, the air inlet side of the centrifugal fan 130 faces the air inlet part 120, and the air outlet side of the centrifugal fan 130 faces the air outlet part 110; the driving device is arranged on the volute 100 and is used for driving the centrifugal fan 130 to rotate; the driving device drives the centrifugal fan 130 to rotate, so as to drive sulfur hexafluoride gas to flow in the middle of the pipeline, so that the humidity detection device A2 can accurately detect the humidity of the sulfur hexafluoride gas in the working cavity of the electrical equipment A1.

As shown in fig. 4, the driving device includes an outer rotor 140 motor, a stator 150 of the outer rotor 140 motor is disposed outside the volute 100, and a rotor 140 of the outer rotor 140 motor is fixedly connected with the centrifugal fan 130 coaxially; because the rotor 140 of the motor and the centrifugal fan 130 are integrally positioned in the volute 100, the motor stator 150 is positioned outside the volute 100, and the rotating part does not need to pass through the casing of the volute 100, so that the possibility that sulfur hexafluoride gas leaks out of a gap between the rotating shaft and the volute 100 is effectively reduced.

Specifically, the outer rotor 140 motor is a variable frequency motor, at this time, the rotating speed of the fan can be controlled by changing the frequency of the motor, and when the electrical equipment A1 works in daily life, the motor can be controlled to drive the centrifugal wind wheel to rotate at a slower speed; when the humidity detection device A2 detects that sulfur hexafluoride gas is too high, the motor can be controlled to drive the centrifugal wind wheel to rotate rapidly, so that sulfur hexafluoride gas circulates between the electrical equipment A1 and the drying device A6 at a relatively high speed, and drying efficiency is improved.

Wherein, in order to facilitate maintenance when the motor fails, the stator 150 of the outer rotor 140 motor is detachably connected with the volute 100; the electronics of the outer rotor 140 motor may be connected to the volute 100 by various means such as screw fixation or snap fixation.

As shown in fig. 5 to 7, the drying apparatus A6 includes: the box body 200 is provided with a drying inner cavity, two drying interfaces 201 communicated with the drying inner cavity are arranged on the box body 200, and the two drying interfaces 201 are respectively communicated with a third interface of the first three-way valve A4 and a third interface of the second three-way valve A5; the adsorption assembly 230 is arranged in the drying inner cavity, and the adsorption assembly 230 comprises a solid adsorbent which can absorb moisture contained in sulfur hexafluoride gas; wherein, the solid adsorbent can be a medicament which is commonly used in the prior art and does not react with sulfur hexafluoride gas but can absorb moisture, such as sodium hydroxide solid, anhydrous copper sulfate solid or silica gel particles, etc.; because the solid adsorbent is integrally positioned in the drying cavity, no outward drainage is needed, the tightness of the drying device A6 can be ensured by adopting the solid adsorbent for drying, and the leakage of sulfur hexafluoride gas in the drying process is effectively prevented.

Wherein, the drying device A6 also comprises a weight sensor 240 arranged on the bottom wall of the drying cavity, and the solid adsorbent is integrally arranged above the weight sensor 240; in the drying process, the weight of the solid adsorbent increases after absorbing moisture in sulfur hexafluoride gas, and when the weight sensor 240 detects that the weight of the solid adsorbent is greater than a specified value, a signal can be sent to prompt on-site maintenance personnel to replace the solid adsorbent.

Specifically, the case 200 is detachably connected with a bottom cover 210, the bottom cover 210 can close the drying cavity, and the weight sensor 240 is disposed on the bottom cover 210; when the solid adsorbent needs to be maintained, the bottom cover 210 is only required to be detached from the box body 200, and the solid adsorbent is taken out and replaced; the bottom cover 210 may be detachably connected to the case 200 in various manners, for example, by a screw or a snap connection, etc., wherein, in order to ensure the tightness of the portion between the bottom cover 210 and the case 200, a sealing ring may be further disposed at the portion where the case 200 abuts against the bottom cover 210.

As shown in fig. 5 to 7, a vacuum-pumping interface is arranged on the box 200, and the vacuum-pumping interface is used for connecting a sulfur hexafluoride vacuum-pumping recovery device; the vacuumizing interface is provided with a switch valve 220, and the switch valve 220 can be connected with a sulfur hexafluoride vacuumizing recovery device; when the weight sensor 240 detects that the weight of the solid adsorbent is greater than the prescribed value, the second port and the third port of the first three-way valve A4 may be controlled to communicate, and the second port and the third port of the second three-way valve A5 may be controlled to communicate; connecting the switch valve 220 with a sulfur hexafluoride vacuumizing recovery device, and recovering sulfur hexafluoride gas in the drying inner cavity; after recovery is completed, withdrawing the sulfur hexafluoride vacuumizing recovery device, opening the switch valve 220, recovering normal air pressure in the drying cavity, removing the bottom cover 210, replacing the solid adsorbent, and then installing back; then connecting the switch valve 220 with a vacuumizing device for vacuumizing, closing the switch valve 220 after vacuumizing is completed, and dismantling the vacuumizing device; the leakage of sulfur hexafluoride gas is reduced to the greatest extent in the whole maintenance process, and meanwhile, the mixing of external gas into sulfur hexafluoride gas and entering the electrical equipment A1 are reduced, so that the purity of the sulfur hexafluoride gas is ensured.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. A sulfur hexafluoride gas and moisture monitoring device, comprising:

an electrical device (A1) having a working chamber filled with sulfur hexafluoride gas;

a humidity detection device (A2) communicated with the working cavity;

a first three-way valve (A4), wherein a first interface of the first three-way valve (A4) is communicated with the humidity detection device (A2);

a drying device (A6) communicated with a third interface of the first three-way valve (A4);

a second three-way valve (A5), wherein a second interface of the second three-way valve (A5) is communicated with a second interface of the first three-way valve (A4), and a third interface of the second three-way valve (A5) is communicated with the drying device (A6);

and the fan assembly (A3) is communicated with the first interface of the second three-way valve (A5) and the working inner cavity.

2. The sulfur hexafluoride gas and moisture monitoring device of claim 1 wherein the blower assembly (A3) includes:

the volute (100) is provided with an air inlet part (120) and an air outlet part (110), the air inlet part (120) is communicated with a first interface of the second three-way valve (A5), and the air outlet part (110) is communicated with the working inner cavity;

the centrifugal fan (130) is arranged in the volute (100), the air inlet side of the centrifugal fan (130) faces the air inlet part (120), and the air outlet side of the centrifugal fan (130) faces the air outlet part (110);

and the driving device is arranged on the volute (100) and is used for driving the centrifugal fan (130) to rotate.

3. The sulfur hexafluoride gas and moisture monitoring device according to claim 2, wherein the driving device comprises an outer rotor (140) motor, a stator (150) of the outer rotor (140) motor is disposed outside the volute (100), and the outer rotor (140) of the outer rotor (140) motor is fixedly connected with the centrifugal fan (130) coaxially.

4. A sulfur hexafluoride gas and moisture monitoring device according to claim 3, characterized in that the outer rotor (140) motor is a variable frequency motor.

5. A sulfur hexafluoride gas and moisture monitoring device according to claim 3, characterized in that the stator (150) of the outer rotor (140) motor is detachably connected to the volute (100).

6. The sulfur hexafluoride gas and moisture monitoring device according to claim 1, wherein the drying device (A6) includes:

the box body (200) is provided with a drying inner cavity, two drying interfaces (201) communicated with the drying inner cavity are arranged on the box body (200), and the two drying interfaces (201) are respectively communicated with a third interface of the first three-way valve (A4) and a third interface of the second three-way valve (A5);

and an adsorption assembly (230) disposed in the drying cavity, wherein the adsorption assembly (230) comprises a solid adsorbent capable of absorbing moisture contained in the sulfur hexafluoride gas.

7. The sulfur hexafluoride gas and moisture monitoring device of claim 6 wherein the drying means (A6) further comprises a weight sensor (240) disposed at a bottom wall of the drying chamber, the solid adsorbent being disposed entirely above the weight sensor.

8. The sulfur hexafluoride gas and moisture monitoring device of claim 7 wherein the housing (200) is removably connected with a bottom cover (210), the bottom cover (210) being capable of closing the drying cavity, the weight sensor (240) being disposed on the bottom cover (210).

9. The sulfur hexafluoride gas and moisture monitoring device according to claim 8, wherein a vacuum-pumping interface is provided on the box (200), and the vacuum-pumping interface is used for connecting with a sulfur hexafluoride vacuum-pumping recovery device.

10. The sulfur hexafluoride gas and moisture monitoring device according to claim 9, wherein the vacuum pumping port is provided with a switch valve (220), and the switch valve (220) can be connected with the sulfur hexafluoride vacuum pumping recovery device.